Thieves who accessed a DSW Shoe Warehouse database obtained 1.4 million credit card numbers and the names on those accounts - 10 times more than investigators estimated last month.

DSW Shoe Warehouse said Monday that it has contact information for about half of those people and started sending letters notifying them of the thefts, which happened at 108 stores in 25 states between November and February. A list of the stores is available on the company's Web site.

The stolen information did not include home addresses or personal identification numbers, the Columbus, Ohio-based company said in a statement.

The company, a subsidiary of Retail Ventures Inc., announced the thefts last month after notifying federal authorities and credit card companies. At the time, the Secret Service said only that information involving more than 100,000 people had been compromised.